Re: Sneak peek pecker extension
[Re: justinp61]
#2502233
05/30/18 02:00 PM
05/30/18 02:00 PM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I may be out in left field here, but if I were to put one on my car I'd want it to trip everything but the pre stage/stage beams, even under full power. Thats what you want.. mount the stripe taker about 4" off the ground with you in it... some cars get higher at speed some get lower
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Re: Sneak peek pecker extension
[Re: Spaceman Spiff]
#2502264
05/30/18 03:12 PM
05/30/18 03:12 PM
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Joined: Jan 2003
Posts: 13,376 Marion, South Carolina [><]
an8sec70cuda
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I Live Here
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Marion, South Carolina [><]
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The little secret they don't want to mention is that it also increases MPH readings 3-5 mph, so they can brag about how much more Horsepower they have. How does it do that? If the cones/beams down track are all the same height (lower than the stage beam), how does the extension make the MPH faster? I understand the ET being slightly quicker b/c the distance travelled is thrown off w/ the extension. MILES PER HOUR TIMER Also known as the speed trap, this timer is located 66 feet before the finish line. It records the car’s average speed between it and the finish line. This is the mile per hour figure on your time slip. So, if the car got there sooner, with the extension, would it fool the timer into a faster speed? My understanding is that the MPH is measured on how long it takes the car to break the last two beams at the end of the track. The extension breaks these two beams, unlike the stage beams which are broken by the tires. With an extension, the car will technically get to the last two beams quicker, but it will not change the speed at which it breaks both of them.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Sneak peek pecker extension
[Re: WHITEDART]
#2502276
05/30/18 03:27 PM
05/30/18 03:27 PM
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Joined: Jan 2003
Posts: 19,377 Las Vegas
Al_Alguire
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I Live Here
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Las Vegas
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Starting line beams are usually right at 1.5"+-. The top end beams are generally 6"+-. The Rulebook has a 3" minimum rule to make sure you clear. Means nothing about how high the beams are. If the rules allow a pecker extender then why not take advantage of it. Some of the new late model cars have 40" of front overhang on them. Meaning when you leave the have an immediate 40" advantage on cars like a Dart that is not in the weeds.
I believe the NHRA's current stance on pecker extenders is they are not legal. They are only allowed to be even with the farthest point forward on the car, ie the leading edge of the front bumper. Many many bracket cars use stripe takers on the front end. Once of those things you need to pay attention to in the lanes for sure.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Sneak peek pecker extension
[Re: Al_Alguire]
#2502593
05/31/18 10:08 AM
05/31/18 10:08 AM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
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Posts: 3,036
bean town ....Ca
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Starting line beams are usually right at 1.5"+-. The top end beams are generally 6"+-. The Rulebook has a 3" minimum rule to make sure you clear. Means nothing about how high the beams are. If the rules allow a pecker extender then why not take advantage of it. Some of the new late model cars have 40" of front overhang on them. Meaning when you leave the have an immediate 40" advantage on cars like a Dart that is not in the weeds.
I believe the NHRA's current stance on pecker extenders is they are not legal. They are only allowed to be even with the farthest point forward on the car, ie the leading edge of the front bumper. Many many bracket cars use stripe takers on the front end. Once of those things you need to pay attention to in the lanes for sure. thank you for clarifying The Starting Line beam height.. I will be taking the car out tonight to test the new converter as well as the extension.. hopefully all goes well
Last edited by WHITEDART; 05/31/18 10:09 AM.
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: Sneak peek pecker extension
[Re: an8sec70cuda]
#2502699
05/31/18 02:04 PM
05/31/18 02:04 PM
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Joined: Jan 2003
Posts: 5,894 Florida
Locomotion
master
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master
Joined: Jan 2003
Posts: 5,894
Florida
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The little secret they don't want to mention is that it also increases MPH readings 3-5 mph, so they can brag about how much more Horsepower they have. How does it do that? If the cones/beams down track are all the same height (lower than the stage beam), how does the extension make the MPH faster? I understand the ET being slightly quicker b/c the distance travelled is thrown off w/ the extension. MILES PER HOUR TIMER Also known as the speed trap, this timer is located 66 feet before the finish line. It records the car’s average speed between it and the finish line. This is the mile per hour figure on your time slip. So, if the car got there sooner, with the extension, would it fool the timer into a faster speed? My understanding is that the MPH is measured on how long it takes the car to break the last two beams at the end of the track. The extension breaks these two beams, unlike the stage beams which are broken by the tires. With an extension, the car will technically get to the last two beams quicker, but it will not change the speed at which it breaks both of them. MPH will be faster if a driver can break the beams with the front tires but hit the brakes and dip the nose for a stripe taker or spoiler to trip the last MPH beam, which is also the finish line/stop ET. They wouldn't be losing much actual forward momentum, but it can dip the front with soft springs/shocks.
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Re: Sneak peek pecker extension
[Re: WHITEDART]
#2502745
05/31/18 03:58 PM
05/31/18 03:58 PM
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Joined: Jan 2003
Posts: 13,376 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,376
Marion, South Carolina [><]
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Myron, you're right, that's the only way the MPH could be affected. From what I've seen of the cars running these extensions, they are fast enough that the front of the car is slammed to the ground at speed for aerodynamics. Not to mention the speeds they're running. I find it hard to believe any of them are diving on the brakes to "gain" a couple mph.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Sneak peek pecker extension
[Re: WHITEDART]
#2502794
05/31/18 06:08 PM
05/31/18 06:08 PM
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Joined: Jan 2003
Posts: 7,495 Minnesota
Hemi_Joel
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master
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Posts: 7,495
Minnesota
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Let's say you have a car that goes 140 mph in the 1/4. If you add a pecker extender, how much ET do you lose per inch?
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: Sneak peek pecker extension
[Re: Hemi_Joel]
#2502800
05/31/18 06:24 PM
05/31/18 06:24 PM
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Joined: Aug 2003
Posts: 43,240 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,240
Bend,OR USA
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Let's say you have a car that goes 140 mph in the 1/4. If you add a pecker extender, how much ET do you lose per inch? You should gain ET, run quicker, by some .0001s, not loose it due to the clocks stopping sooner off of the stripe taker, correct If your traveling at 140 MPH when you multiplied 140 MPH by 5280=739200 which is the feet per hour, correct If you multiply that by 12 inches for inches per hour you get 8870400 inches per hour which = inches per minute when you divide that by 12=147840 inches per minute which divided by 60 again to get the feet per second=2464 inches per second which also = 205.33 Ft. per second, correct If you took a 18 inch extension for the stripe taker from the front edge of the tires it should be the same as dividing 2464 by 100 to get the inches per one hundred of a second, correct 2464 divided by 100 =24.64 inches per .01 ET so the gain should be less than .01, correct I'm not a math guru or drag racing geek so those more in the know on this please chip in if I have part of this math incorrect please so I can learn the proper way to figure things like this out
Last edited by Cab_Burge; 05/31/18 06:46 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Sneak peek pecker extension
[Re: WHITEDART]
#2502841
05/31/18 07:16 PM
05/31/18 07:16 PM
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Joined: Jan 2003
Posts: 7,495 Minnesota
Hemi_Joel
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Minnesota
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OK, Cab, I took your math to the next level and came up with this:
.000002857 per mph per inch. So lets look at an 18" extender at 140: 18x140x.000002857 = .0072 quicker ET.
At 200 mph: .010
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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